Over the past few decades, scientists have suggested that high levels of HDL—which has come to be known as "good cholesterol"—can reduce the risk of heart attack. New evidence, however, suggests that might not be the case after all. »5/17/12 6:40am 5/17/12 6:40am

Scientists have developed a test that detects whether the large, misshapen, mutant cells that indicate you're due for an acute myocardial infarction are circulating through your bloodstream. That's right: There's a heart attack test. And it works. »3/21/12 2:00pm 3/21/12 2:00pm